facepalm

Does anyone know the interchangeability of various J-series engine blocks? My 2007 MDX engine pooped the bed and junkyards want around $3500 for a used one, while I can get an Odyssey engine for less than a third that. I don't care about the minor HP loss. I'd like to find something else to plop in there, even if I have to monkey around with intakes and fittings and what not.

Any advice would be appreciated. I know it's an oddball question, but I've done this kind of thing successfully before.